The nervous system - peripheral nervous system - ch 12 Flashcards
Explain the main role of the peripheral nervous system?
To act as a communicator channel between the CNS and the body’s organs, glands and muscles and to sensory receptors in the limbs and the skin.
What two systems can the peripheral nervous system be divided into?
- somatic nervous system
2. autonomic nervous system
What does the somatic nervous system transmit?
communications relating to the senses
What is the somatic nervous system responsible for?
Managing voluntary body movements
What does the somatic nervous system consist of?
- 31 pairs of spinal nerves
2. 12 pairs of cranial nerves
Describe the role of the spinal nerves?
spinal nerves carry sensory impulses into and motor impulses out of the spinal cord.
How are spinal nerves named?
According to the vertebrae they are associated with
How many pairs of cervical nerves?
8 pairs
How many pairs of thoracic nerves?
12 pairs
How many pairs of lumbar nerves?
5 pairs
How many pairs of cervical nerves?
5 pairs
How many pairs of coccygeal nerves?
1 pair
Where do the nerves branch off from?
the spinal cord into the thorax, abdomen and extremities
What is the role of the cranial nerves?
to carry impulses into and out of the cerebrum or brain stem
Which nerves are named according to their function or structure and are designated by the roman numerals I-XII.
cranial nerves